#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<string.h>
int main()
{
	char arr1[80];
	gets(arr1);
	size_t len1 = strlen(arr1);
	char arr2[26];
	int k = 0;
	for (int i = 0; i < len1; i++) {
		int is = 1;
		if (arr1[i] < 'A' || arr1[i]>'Z') {
			continue;;
		}
		for (int j = 0; j < k; j++) {
			if (arr1[i] == arr2[j]) {
				is = 0;
			}
		}
		if (is == 1) {
			arr2[k] = arr1[i];
			k++;
			printf("%c", arr1[i]);
		}
	}
	if (k == 0) {
		printf("Not Found");
	}
	return 0;
}